Mark the tests that were just disabled more clearly in the makefiles.

content/base/test/Makefile.in

@@ -139,6 +139,8 @@ _TEST_FILES = 	test_bug5141.html \
 		test_bug395915.html \
 		test_bug397234.html \
 		test_bug398243.html \
+		$(warning test_bug419132.html disabled because it takes 60 seconds) \
+		$(warning bug419132.html disabled because it takes 60 seconds) \
 		formReset.html \
 		bug382113_object.html \
 		test_bug326337.html \

content/html/document/test/Makefile.in

@@ -71,6 +71,7 @@ _TEST_FILES = 	test_bug1682.html \
 		test_bug403868.html \
 		test_bug403868.xhtml \
 		test_bug404320.html \
+		$(warning test_bug435128.html disabled because it takes 60 seconds) \
 		test_bug468353.html \
 		test_form-parsing.html \
 		test_viewport.html \

layout/generic/test/Makefile.in

@@ -70,6 +70,7 @@ _TEST_FILES = \
 		test_bug405178.html \
 		test_bug416168.html \
 		test_bug421436.html \
+		$(warning test_bug421839-1.html disabled because it calls finish twice which can cause timeouts) \
 		test_bug421839-2.html \
 		bug421839-2-page.html \
 		test_bug448860.html \